Friction-clutch.



PATENTED OCT. 25,v 1904.

No. 773,333.V

c. H. NYsTRoM.

EMOTION CLUTCH.

APPLICATION FILED MAB. 3, 1904.

N0 MODEL.

ATTORNEY fixed stud-pivot Z and having a pulley c forv Patented October 25, 1904.

PATENT CEETCE.

CARL H. NYSTBOM, OF YONKERS, NEW YORK. Y

FRICT'loN-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 773,336, dated October 25, 1904.

Applies@ filed March s, 1904.

new and useful Improvements in Friction-' Clutches, of whichthe following is a specification.

My invention relates to improvements in friction-clutches, and is designed to provide such clutches in simple, cheap, and reliable construction, as hereinafter described, reference being' made to the accompanying' drawings, in which- Figure l is partly a section in the plane of the shaft and partly a side view. Fig. 2 is a transverse section on line 2 2 of Fig. l with details of the gripping-jaws in section. Fig. 3 is a detail showing an end View of the shaft.

A represents a rotatory disk mounted on a being rotated by a belt, said stud having suitable projection from a suitable supportingframe CZ for securing and carrying the disk, and said disk having an extended'hub a for affording substantial bearing for it with a tap-studf, inserted through one side of the hub into an annular groove g of the stud-pivot Z to retain the disk on said stud-pivot.

The disk A has a lateral flange Zr at the periphery, which is preferably slightly grooved on the inside, as shown a-t fai, in which a pair of radially-disposed gripping-jaws j are arranged with their outer ends in suitable Arelation to the inner face of flange ZL for being' thrust against said inner face to grip thereon in frictional Contact. The inner ends of said jaws are formed with an approximately but somewhat less than a half-circular notch Zt in each, which notches are tapered also transversely of the jaws, as shown in Fig. l, in suitable relation with a taper elliptical section Z of a short shaft my, mounted by a journal a, extending from the small end of said section Z into a socket `0 of one end of stud-pivot Z1, and a journal p of the other end having any suitable bearing y, so that saidV shaft can shift lengthwise within certain limits.

. A pulley q is mounted on shaft m by featherkeys o', so that the shaft can shift lengthwise Serial No. 196,313. (No model.)

in the pulley, and-a forked shifting-lever s or other approved device for so shifting the shaft while in motion is provided, said lever having a latch Z and a rack u to hold it while maintaining the operative condition of the clutch, which is effected by the outward thrust of jaws 7' by the taper section Z when the handle of lever s is shifted to the right, at the same time the elliptic form of section Zand corresponding shape of the notches Z: lock the shaft in the jaws for causing rotation of pulley g with the disk.

Springs o 'are employed in connection with the jaws j for reti-acting them when the thrust of section Z is relaxed to release the frictional grip and stop the rotation of pulley q.

The jaws are coupled with dowel-pins fw, inserted in suitable sockets in the meeting ends thereof to coact with the control of the outer ends of the jaws in the groove Z for maintaining the proper working positions of the jaws. Y

The keys fr may have a head .fu to limit the lateral shift of the pulley g to the right on shaft m. The iiange /t of the disk prevents it from shifting the other way.

1t may be noted that the lateral shift of the slidable shaft is so short that the sliding of the shaft in the pulley may not be required with suitable clearance between the pulley and the disk to avoid conflict.

What l claim as my invention isl'. The combination with a rotatory disk A, having a lateral peripheral flange, of the laterally-slidable shaft axially coincident with the axis of the disk and located on the anged side of said disk, a taper elliptical section of said shaft in the circumferential plane of the flange of the disk, radial gripping-jaws located in the same plane, and adapted to be thrust into frictional contact with the diskange by the lateral thrust of the slidable shaft, means for shifting said -shaft and maintaining it in the shifted position, means for retracting the jaws and means for transmitting motion from the slidable shaft.

2. The combination with a rotatory disk A, having a lateral peripheral ange, and mounted on a fixed pivot-stud, a laterally-slidable i i i shaft, means for shifting said shaft and maintaining it in the shifted position, nie-Mis for retin-@ting the jaws and means for tinnsinitting motion from the slidable shaft. I5

Signed nt New York this 26th day of February, 1904.

CARL H. NYSTROM.

Vitnesses:

C. SnDGwiCk, J M. HOWARD. 

